<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="4">
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
    </el-card>

    <!-- 角色列表区域 -->
    <el-table :data="roleList" border stripe row-key='id'>
      <!-- 展开列 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row
            v-for="(item1,i1) in scope.row.children"
            :key="item1.id"
            :class="['bdbottom',i1===0?'bdtop':'','vcenter']"
          >
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级和三级权限 -->
            <el-col :span="19">
              <!-- 二级 -->
              <el-row
                v-for="(item2,i2) in item1.children"
                :key="item2.id"
                :class="[i2===0?'':'bdtop','vcenter']"
              >
                <el-col :span="6">
                  <el-tag
                    type="success"
                    closable
                    @close="removeRightById(scope.row,item2.id)"
                  >{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag
                    type="warning"
                    v-for="(item3) in item2.children"
                    :key="item3.id"
                    closable
                    @close="removeRightById(scope.row,item3.id)"
                  >{{item3.authName}}</el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
          <!-- <pre>{{scope.row}}</pre> -->
        </template>
      </el-table-column>
      <!-- 索引列 -->
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName" width="180"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc" width="180"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
          <el-button
            type="warning"
            icon="el-icon-setting"
            size="mini"
            @click="showSetRightDialog(scope.row)"
          >分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <!-- id=是data里面的 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      roleList: [],
      setRightDialogVisible: false,
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      // 默认选中的节点的id值数组
      defKeys: [105, 116],
      // 目前即将分配权限的角色id
      roleId: ""
    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.roleList = res.data;
      console.log(this.roleList);
    },
    // 根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹窗提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(() => {
        this.$message.info("已取消删除");
      });

      const { data: res } = await this.$http
        .delete(`roles/${role.id}/rights/${rightId}`)
        .catch(() => {
          this.$message.error("删除权限失败");
        });
      // this.getRoleList()
      // 直接将最新data赋给展开类，防止整个列表刷新
      role.children = res.data;
    },
    // 设置分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree").catch(() => {
        return this.$message.error("获取权限数据失败");
      });
      this.rightsList = res.data;
      console.log(this.rightsList);
      // 获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr);
      });
    },
    // 监听喷配权限对话框的关闭
    setRightDialogClosed() {
      this.defKeys = [];
    },
    //为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http
        .post(`roles/${this.roleId}/rights`, { rids: idStr })
        .catch(() => {
          return this.$message.error("更新权限失败");
        });
      this.$message.success("分配权限成功");
      this.getRoleList();
      this.setRightDialogVisible = false;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>